using System;

namespace SDET.Util
{
    public class nl
    {
        public static void Main(string[] args)
        {
            int counter = 1;
            string line;

            if(args.Length > 0 && System.IO.File.Exists(args[0]))
            {
                System.IO.StreamReader file =  new System.IO.StreamReader(args[0]);
                while((line = file.ReadLine()) != null)
                {
                   Console.WriteLine ("{0,3:D}:{1}", counter++, line);
                }
                file.Close();
            }
        }
    }
}